Canon 5D MIV has a 30.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic 6+ processor. On the other hand, Sony A7 III has a 24.0MP Full frame (35.8 x 23.8 mm ) sized BSI-CMOS sensor and features Bionz X processor.
Canon 5D MIV's sensor provides 6MP more than Sony A7 III's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the 5D MIV and A7 III sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 5D MIV and Sony A7 III Cameras
Canon 5D MIV and Sony A7 III have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Canon 5D MIV and Sony A7 III sensors have been tested by DxO and the results show that A7 III has a better overall score of 96, 5 points higher compared to 5D MIV's score of 91.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Canon 5D MIV |
91 |
24.8 bits |
13.6 Evs |
2995 ISO |
|
Sony A7 III |
96 |
25.0 bits |
14.7 Evs |
3730 ISO |